== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:52:02 (1788601922)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1675 s, 8.6 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff92abc2c60000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.306569
Iter 1/10: OSS cache speed: 0.306429
Iter 1/10: ladvise speed: 0.342444
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.317084
Iter 2/10: OSS cache speed: 0.298744
Iter 2/10: ladvise speed: 0.292397
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.316007
Iter 3/10: OSS cache speed: 0.306711
Iter 3/10: ladvise speed: 0.253291
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.303702
Iter 4/10: OSS cache speed: 0.288132
Iter 4/10: ladvise speed: 0.304344
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.306042
Iter 5/10: OSS cache speed: 0.335237
Iter 5/10: ladvise speed: 0.274991
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.338918
Iter 6/10: OSS cache speed: 0.324866
Iter 6/10: ladvise speed: 0.358558
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.331138
Iter 7/10: OSS cache speed: 0.335801
Iter 7/10: ladvise speed: 0.327105
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.370829
Iter 8/10: OSS cache speed: 0.33445
Iter 8/10: ladvise speed: 0.345078
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.3292
Iter 9/10: OSS cache speed: 0.348206
Iter 9/10: ladvise speed: 0.332084
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.286702
Iter 10/10: OSS cache speed: 0.32328
Iter 10/10: ladvise speed: 0.333198
Average uncached read: .32
Average speedup with OSS cached read:  .32 = +0%
Average speedup with ladvise willread:  .31 = +-3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0